#!/bin/sh
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

case $0 in
    */*) dir0=`echo "$0" | sed 's,/[^/]*$,,'` ;;
    *) dir0=./ ;;
esac
. "$dir0/ovs-lib" || exit 1

for dir in "$sbindir" "$bindir" /sbin /bin /usr/sbin /usr/bin; do
    case :$PATH: in
        *:$dir:*) ;;
        *) PATH=$PATH:$dir ;;
    esac
done


## ----- ##
## start ##
## ----- ##

pidfile_is_running () {
    pidfile=$1
    test -e "$pidfile" && pid=`cat "$pidfile"` && pid_exists "$pid"
} >/dev/null 2>&1

stop_ovsdb () {
    if pidfile_is_running $DB_NB_PID; then
        ovs-appctl -t $rundir/ovnnb_db.ctl exit
    fi

    if pidfile_is_running $DB_SB_PID; then
        ovs-appctl -t $rundir/ovnsb_db.ctl exit
    fi
}

start_ovsdb () {
    # Check and eventually start ovsdb-server for Northbound DB
    if ! pidfile_is_running $DB_NB_PID; then
        upgrade_db "$DB_NB_FILE" "$DB_NB_SCHEMA" 1>/dev/null 2>/dev/null

        set ovsdb-server

        set "$@" --detach $OVN_NB_LOG --log-file=$OVN_NB_LOGFILE --remote=punix:$DB_NB_SOCK --remote=ptcp:$DB_NB_PORT:$DB_NB_ADDR --pidfile=$DB_NB_PID --unixctl=ovnnb_db.ctl

        $@ $DB_NB_FILE
    fi

    # Check and eventually start ovsdb-server for Southbound DB
    if ! pidfile_is_running $DB_SB_PID; then
        upgrade_db "$DB_SB_FILE" "$DB_SB_SCHEMA" 1>/dev/null 2>/dev/null

        set ovsdb-server

        set "$@" --detach $OVN_SB_LOG --log-file=$OVN_SB_LOGFILE --remote=punix:$DB_SB_SOCK --remote=ptcp:$DB_SB_PORT:$DB_SB_ADDR --pidfile=$DB_SB_PID --unixctl=ovnsb_db.ctl
        $@ $DB_SB_FILE
    fi
}

status_ovsdb () {
  if ! pidfile_is_running $DB_NB_PID; then
      log_success_msg "OVN Northbound DB is not running"
  else
      log_success_msg "OVN Northbound DB is running"
  fi

  if ! pidfile_is_running $DB_SB_PID; then
      log_success_msg "OVN Southbound DB is not running"
  else
      log_success_msg "OVN Southbound DB is running"
  fi
}

start_northd () {
  if test X"$OVN_MANAGE_OVSDB" = Xyes; then
      start_ovsdb
  fi

  if ! pidfile_is_running $DB_NB_PID; then
      log_failure_msg "OVN Northbound DB is not running"
      exit
  fi
  if ! pidfile_is_running $DB_SB_PID; then
      log_failure_msg "OVN Southbound DB is not running"
      exit
  fi

  if daemon_is_running ovn-northd; then
      log_success_msg "ovn-northd is already running"
  else
      set ovn-northd
      if test X"$OVN_NORTHD_LOGFILE" != X; then
          set "$@" --log-file=$OVN_NORTHD_LOGFILE
      fi
      set "$@" $OVN_NORTHD_LOG --ovnnb-db=unix:$DB_NB_SOCK --ovnsb-db=unix:$DB_SB_SOCK
      OVS_RUNDIR=${OVN_RUNDIR} start_daemon "$OVN_NORTHD_PRIORITY" "$OVN_NORTHD_WRAPPER" "$@"
  fi
}

start_controller () {
    set ovn-controller "unix:$DB_SOCK"
    set "$@" -vconsole:emer -vsyslog:err -vfile:info
    OVS_RUNDIR=${OVN_RUNDIR} start_daemon "$OVN_CONTROLLER_PRIORITY" "$OVN_CONTROLLER_WRAPPER" "$@"
}

## ---- ##
## stop ##
## ---- ##

stop_northd () {
    OVS_RUNDIR=${OVN_RUNDIR} stop_daemon ovn-northd

    if test X"$OVN_MANAGE_OVSDB" = Xyes; then
        stop_ovsdb
    fi
}

stop_controller () {
    OVS_RUNDIR=${OVN_RUNDIR} stop_daemon ovn-controller
}

## ------- ##
## restart ##
## ------- ##

restart_northd () {
    stop_northd
    start_northd
}

restart_controller () {
    stop_controller
    start_controller
}

restart_ovsdb () {
    stop_ovsdb
    start_ovsdb
}

## ---- ##
## main ##
## ---- ##

set_defaults () {
    OVN_MANAGE_OVSDB=yes

    DB_NB_SOCK=$rundir/ovnnb_db.sock
    DB_NB_PID=$rundir/ovnnb_db.pid
    DB_NB_FILE=$dbdir/ovnnb_db.db
    DB_NB_ADDR=0.0.0.0
    DB_NB_PORT=6641

    DB_SB_SOCK=$rundir/ovnsb_db.sock
    DB_SB_PID=$rundir/ovnsb_db.pid
    DB_SB_FILE=$dbdir/ovnsb_db.db
    DB_SB_ADDR=0.0.0.0
    DB_SB_PORT=6642

    DB_NB_SCHEMA=$datadir/ovn-nb.ovsschema
    DB_SB_SCHEMA=$datadir/ovn-sb.ovsschema

    DB_SOCK=$rundir/db.sock
    DB_CONF_FILE=$dbdir/conf.db

    OVN_NORTHD_PRIORITY=-10
    OVN_NORTHD_WRAPPER=
    OVN_CONTROLLER_PRIORITY=-10
    OVN_CONTROLLER_WRAPPER=

    OVS_RUNDIR=${OVS_RUNDIR:-${rundir}}
    OVN_RUNDIR=${OVN_RUNDIR:-${OVS_RUNDIR}}

    OVN_CONTROLLER_LOG="-vconsole:emer -vsyslog:err -vfile:info"
    OVN_NORTHD_LOG="-vconsole:emer -vsyslog:err -vfile:info"
    OVN_NORTHD_LOGFILE=""
    OVN_NB_LOG="-vconsole:off"
    OVN_SB_LOG="-vconsole:off"
    OVN_NB_LOGFILE="$logdir/ovsdb-server-nb.log"
    OVN_SB_LOGFILE="$logdir/ovsdb-server-sb.log"
}

set_option () {
    var=`echo "$option" | tr abcdefghijklmnopqrstuvwxyz- ABCDEFGHIJKLMNOPQRSTUVWXYZ_`
    eval set=\${$var+yes}
    eval old_value=\$$var
    if test X$set = X || \
        (test $type = bool && \
        test X"$old_value" != Xno && test X"$old_value" != Xyes); then
        echo >&2 "$0: unknown option \"$arg\" (use --help for help)"
        return
    fi
    eval $var=\$value
}

usage () {
    set_defaults
    cat << EOF
$0: controls Open Virtual Network daemons
usage: $0 [OPTIONS] COMMAND

This program is intended to be invoked internally by Open Virtual Network
startup scripts.  System administrators should not normally invoke it directly.

Commands:
  start_northd           start ovn-northd
  start_ovsdb            start ovn related ovsdb-server processes
  start_controller       start ovn-controller
  stop_northd            stop ovn-northd
  stop_ovsdb             stop ovn related ovsdb-server processes
  stop_controller        stop ovn-controller
  restart_northd         restart ovn-northd
  restart_ovsdb          restart ovn related ovsdb-server processes
  restart_controller     restart ovn-controller

Options:
  --ovn-northd-priority=NICE     set ovn-northd's niceness (default: $OVN_NORTHD_PRIORITY)
  --ovn-northd-wrapper=WRAPPER   run with a wrapper like valgrind for debugging
  --ovn-controller-priority=NICE     set ovn-northd's niceness (default: $OVN_CONTROLLER_PRIORITY)
  --ovn-controller-wrapper=WRAPPER   run with a wrapper like valgrind for debugging
  --ovn-manage-ovsdb=yes|no        Whether or not the OVN databases should be
                                   automatically started and stopped along
                                   with ovn-northd. The default is "yes". If
                                   this is set to "no", the "start_ovsdb" and
                                   "stop_ovsdb" commands must be used to start
                                   and stop the OVN databases.
  --ovn-controller-log=STRING        ovn controller process logging params (default: $OVN_CONTROLLER_LOG)
  --ovn-northd-log=STRING            ovn northd process logging params (default: $OVN_NORTHD_LOG)
  --ovn-northd-logfile=STRING        ovn northd process log file (default: $OVN_NORTHD_LOGFILE)
  --ovn-nb-log=STRING             ovn NB ovsdb-server processes logging params (default: $OVN_NB_LOG)
  --ovn-sb-log=STRING             ovn SB ovsdb-server processes logging params (default: $OVN_SB_LOG)
  -h, --help                     display this help message

File location options:
  --db-sock=SOCKET     JSON-RPC socket name (default: $DB_SOCK)
  --db-nb-file=FILE    OVN_Northbound db file (default: $DB_NB_FILE)
  --db-sb-file=FILE    OVN_Southbound db file (default: $DB_SB_FILE)
  --db-nb-schema=FILE  OVN_Northbound db file (default: $DB_NB_SCHEMA)
  --db-sb-schema=FILE  OVN_Southbound db file (default: $DB_SB_SCHEMA)
  --db-nb-addr=ADDR    OVN Northbound db ptcp address (default: $DB_NB_ADDR)
  --db-nb-port=PORT    OVN Northbound db ptcp port (default: $DB_NB_PORT)
  --db-sb-addr=ADDR    OVN Southbound db ptcp address (default: $DB_SB_ADDR)
  --db-sb-port=PORT    OVN Southbound db ptcp port (default: $DB_SB_PORT)
  --ovn-nb-logfile=FILE OVN Northbound log file (default: $OVN_NB_LOGFILE)
  --ovn-sb-logfile=FILE OVN Southbound log file (default: $OVN_SB_LOGFILE)

Default directories with "configure" option and environment variable override:
  logs: /usr/local/var/log/openvswitch (--with-logdir, OVS_LOGDIR)
  pidfiles and sockets: /usr/local/var/run/openvswitch (--with-rundir, OVS_RUNDIR)
  ovn-nb.db: /usr/local/etc/openvswitch (--with-dbdir, OVS_DBDIR)
  ovn-sb.db: /usr/local/etc/openvswitch (--with-dbdir, OVS_DBDIR)
  system configuration: /usr/local/etc (--sysconfdir, OVS_SYSCONFDIR)
  data files: /usr/local/share/openvswitch (--pkgdatadir, OVS_PKGDATADIR)
  user binaries: /usr/local/bin (--bindir, OVS_BINDIR)
  system binaries: /usr/local/sbin (--sbindir, OVS_SBINDIR)
EOF
}

set_defaults
command=
for arg
do
    case $arg in
        -h | --help)
            usage
            ;;
        --[a-z]*=*)
            option=`expr X"$arg" : 'X--\([^=]*\)'`
            value=`expr X"$arg" : 'X[^=]*=\(.*\)'`
            type=string
            set_option
            ;;
        --no-[a-z]*)
            option=`expr X"$arg" : 'X--no-\(.*\)'`
            value=no
            type=bool
            set_option
            ;;
        --[a-z]*)
            option=`expr X"$arg" : 'X--\(.*\)'`
            value=yes
            type=bool
            set_option
            ;;
        -*)
            echo >&2 "$0: unknown option \"$arg\" (use --help for help)"
            exit 1
            ;;
        *)
            if test X"$command" = X; then
                command=$arg
            else
                echo >&2 "$0: exactly one non-option argument required (use --help for help)"
                exit 1
            fi
            ;;
    esac
done
case $command in
    start_northd)
        start_northd
        ;;
    start_ovsdb)
        start_ovsdb
        ;;
    start_controller)
        start_controller
        ;;
    stop_northd)
        stop_northd
        ;;
    stop_ovsdb)
       stop_ovsdb
        ;;
    stop_controller)
        stop_controller
        ;;
    restart_northd)
        restart_northd
        ;;
    restart_ovsdb)
        restart_ovsdb
        ;;
    restart_controller)
        restart_controller
        ;;
    status_northd)
        daemon_status ovn-northd || exit 1
        ;;
    status_ovsdb)
        status_ovsdb
        ;;
    status_controller)
        daemon_status ovn-controller || exit 1
        ;;
    help)
        usage
        ;;
    preheat)
        echo >&2 "$0: preheating ovn to 350 degrees F."
        exit 1
        ;;
    '')
        echo >&2 "$0: missing command name (use --help for help)"
        exit 1
        ;;
    *)
        echo >&2 "$0: unknown command \"$command\" (use --help for help)"
        exit 1
        ;;
esac
